APPARATUS AND METHOD OF MEASURING AND MANAGING REAL-TIME SPEECH QUALITY IN VoIP NETWORK

Abstract

Provided are an apparatus and method of measuring and managing speech quality in a Voice over Internet Protocol (VoIP) network. According to the present invention, a call session and speech quality are processed by transmitting and receiving messages between a terminal and the apparatus so that a high-quality VoIP service, in which Quality of Service (QoS) between terminals is secured, can be provided to service subscribers and efficiency of quality management of VoIP services can be increased.

1 . An apparatus for measuring and managing speech quality between a transmission terminal and a reception terminal in a Voice over Internet Protocol (VoIP) network, the apparatus comprising:
 a call session management message processing unit which receives and processes a call session management message from the transmission terminal and the reception terminal, the call session management message comprising call session information defined according to a state between the transmission terminal and the reception terminal; and   a quality reporting message processing unit which receives a quality reporting message from the transmission terminal and the reception terminal after a call session is set up, the quality reporting message comprising quality measuring parameters classified by management steps taking the correlation between the quality measuring parameters into account, and calculates speech quality by sessions.   
   
   
       2 . The apparatus of  claim 1 , wherein the call session information comprises at least one of call request information transmitted to the reception terminal from the transmission terminal, acceptance information of the reception terminal with respect to the call request, Synchronization Source (SSRC), and call clear information. 
   
   
       3 . The apparatus of  claim 1 , wherein the quality measuring parameters comprise at least one of a delay time, transmission/reception packet information, a packet processing rate, and a quality index. 
   
   
       4 . The apparatus of  claim 1 , wherein the call session management message processing unit comprises:
 a User Datagram Protocol (UDP) communication module which classifies the received call session management message by types and extracts call session information;   a call session management message processing module which generates a response message with respect to the received call session management message based on the call session information;   a call session management communication module which transmits a state on set-up and completion of the call session according to the call session information to the quality reporting message processing unit; and   a database management module which stores therein the extracted call session information by sessions.   
   
   
       5 . The apparatus of  claim 1 , wherein the quality reporting message processing unit comprises:
 a quality reporting message management communication module which receives information on call session set-up and completion and the quality reporting message;   a quality reporting message processing module which classifies the received quality reporting message by types and extracts speech quality information from the quality reporting message;   a quality measuring accumulation calculating module which calculates an accumulation average value of quality measuring parameters based on the speech quality information accumulated by sessions; and   a database management module which stores therein the extracted speech quality information and the calculated accumulation average value.   
   
   
       6 . A method of measuring and managing speech quality between a transmission terminal and a reception terminal in a Voice over Internet Protocol (VoIP) network, the method comprising:
 receiving and processing a call session management message from the transmission terminal and the reception terminal, the call session management message comprising call session information defined according to a state between the transmission terminal and the reception terminal; and   receiving a quality reporting message from the transmission terminal and the reception terminal after a call session is set up, the quality reporting message comprising quality measuring parameters classified by management steps taking the correlation between the quality measuring parameters into account, and calculating speech quality by sessions.   
   
   
       7 . The method of  claim 6 , wherein the call session information comprises at least one of call request information transmitted to the reception terminal from the transmission terminal, acceptance information of the reception terminal with respect to the call request, Synchronization Source (SSRC), and call clear information. 
   
   
       8 . The method of  claim 6 , when the call session information comprises information on a failure of a session set-up between the transmission terminal and the reception terminal, further comprising removing the transmission terminal and the reception terminal from a call waiting list. 
   
   
       9 . The method of  claim 6 , wherein the quality measuring parameters comprise at least one of a delay time, transmission/reception packet information, a packet processing rate, and a quality index. 
   
   
       10 . The method of  claim 6 , wherein the receiving and processing of the call session management message comprises:
 classifying the received call session management message by types and extracting call session information;   generating a response message with respect to the received call session management message based on the call session information; and   transmitting a state on set-up and completion of the call session according to the call session information to the quality reporting message processing unit.   
   
   
       11 . The method of  claim 6 , wherein the calculating of the speech quality comprises:
 receiving information on call session set-up and completion and the quality reporting message;   classifying the received quality reporting message by types and extracting speech quality information from the quality reporting message; and   calculating an accumulation average value of quality measuring parameters based on the speech quality information accumulated by sessions.   
   
   
       12 . The method of  claim 6 ,
 wherein the call session management message is transmitted and received by a user datagram protocol (UDP); and   wherein the quality reporting message is transmitted and received by a real time transport protocol (RTCP).   
   
   
       13 . A method of measuring and managing speech quality between a transmission terminal and a reception terminal in a Voice over Internet Protocol (VoIP) network, the method comprising:
 receiving a call request reporting message from the transmission terminal to the reception terminal and receiving a call request acceptance reporting message from the reception terminal to the transmission terminal;   receiving an SSRC information reporting message of the transmission terminal and the reception terminal;   receiving a speech quality reporting message from the transmission terminal and the reception terminal, the quality reporting message including the values of quality measuring parameters classified by management steps taking the correlation between the quality measuring parameters into account; and   receiving a call session completion reporting message including a call session completion time.   
   
   
       14 . The method of  claim 13 , further comprising calculating speech quality by sessions based on the call quality reporting message, after the call session is completed.